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A TFN application in Australia is processed within 28 days by the Australian Taxation Office (ATO). In practice, many applicants receive their Tax File Number within two weeks, though the exact timing depends on the ATO's current workload.
How is your TFN delivered?
Your TFN arrives as a physical letter posted to the Australian address you provided in your application. The letter contains your 9-digit TFN and basic information about how to use it.
Important points to know about delivery:
- The TFN is never sent by email or SMS, only by post
- It is mailed to the Australian address listed on your application
- If you move before the letter arrives, it may be delivered to your old address
- The ATO can resend the TFN if the letter is lost, but only after verifying your identity
If you are moving between hostels, use the address of somewhere you will be for at least four weeks to give the letter time to arrive.
What can you do while waiting for your TFN?
You do not need to wait for your TFN before starting work. You can begin working immediately and inform your employer that your application is in progress.
Until your employer has your TFN on file, the standard rule is that they must withhold tax at 45%. Some employers accept the ATO confirmation email as evidence the application is underway and may apply a lower rate, although this is at their discretion.
Any excess tax withheld during the waiting period can be recovered when you lodge your tax return at the end of the Australian financial year.
What if 28 days pass and your TFN has not arrived?
If more than 28 days have passed and your TFN letter has not arrived, take these steps:
- Re-check the address you provided was correct (typos in postcode, suburb, or street number are the most common cause of delays)
- Confirm the date the ATO acknowledged your application (the 28 days starts from then, not the day you clicked submit)
- Get in touch with our team by phone with your reference number from the confirmation email
In most cases, delays are caused by incorrect address details or a lost letter. The ATO can confirm whether your TFN has been issued and arrange to resend it if necessary.
What to do after your TFN arrives
Once you have your TFN, give it to your employer immediately with a completed Tax File Number Declaration form. This is the document that triggers the correct 15% working holiday maker tax rate on your wages going forward.
Your TFN is also required to lodge your tax return and access your superannuation account when you leave Australia.